The Culligan® OR-38 O-Ring fits the following whole house water filters with a 3/8-inch inlet/outlet: Culligan® models US-550/560, SY-5167, SY-5197. The o-ring is used to seal the housing canister to the housing cap to prevent leaks. Replace your O-ring every third filter change or when there is damage to prevent leaks.

• Culligan® OR-38 replacement o-ring for filter assemblies with 3/8-inch inlet/outlet housings.
• O-ring is used to seal the housing canister to cap to prevent leaks in filter system.
• Replace your o-ring with every third filter change to prevent leaks.
• Use with Culligan® US-550/560, SY-5167 or SY-5197
• Package includes: OR-38